Questions & Answers Nexgard for Dogs 24-60 lbs (10-25kg) 3 Chewables Ask a Question Question: Does this medication kill deer ticks? Answer: Nexgard is approved to prevent and kill deer ticks. By Cllinamen on 09 Nov 2015 Question: Do i have to have a vet's prescription to buy the Nexgard flea control medicine for my dogs? Answer: No prescription needed for this product. By Keynthwest on 13 Oct 2015 6-7 of 7 Questions